发明名称 |
RADIO-CONTROLLED WRISTWATCH |
摘要 |
Provided is a radio-controlled wristwatch capable of determining whether or not the illuminance of light irradiating a solar cell is high on the basis of a plurality of different criteria without directly measuring an output voltage value or an output current value of the solar cell. The radio-controlled wristwatch includes: a solar cell; a control circuit which stops operation under a predetermined condition; and an illuminance detection circuit which outputs a signal indicating whether or not illuminance of light irradiating the solar cell is higher than a given threshold value. The radio-controlled wristwatch switches the given threshold value between a first illuminance threshold value and a second illuminance threshold value that is larger than the first illuminance threshold value, starts the control circuit in a stop state when a signal indicating that the illuminance is higher than the first illuminance threshold value is output, receives a satellite signal containing time information from a satellite when a signal indicating that the illuminance is higher than the second illuminance threshold value is output, and displays time corresponding to the time information contained in the received satellite signal. |
申请公布号 |
EP2693277(A4) |
申请公布日期 |
2016.06.22 |
申请号 |
EP20120763015 |
申请日期 |
2012.03.13 |
申请人 |
CITIZEN HOLDINGS CO., LTD.;CITIZEN WATCH CO., LTD. |
发明人 |
HAGITA, TAKUSHI;KATO, AKIRA |
分类号 |
G04G19/00;G04C10/02;G04G5/00;G04R20/04 |
主分类号 |
G04G19/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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